<template>
  <div class="app-container">
  <el-form label-width="120px">

    <el-form-item label="讲师名称">
      <el-input v-model="teacher.name"/>
    </el-form-item>

    <el-form-item label="讲师排序">
      <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
    </el-form-item>

    <el-form-item label="讲师头衔">
      <el-select v-model="teacher.level" clearable placeholder="请选择">
        <!--
        数据类型一定要和取出的json中的一致，否则没法回填
        因此，这里value使用动态绑定的值，保证其数据类型是number
        -->
        <el-option :value="1" label="高级讲师"/>
        <el-option :value="2" label="首席讲师"/>
      </el-select>
    </el-form-item>

    <el-form-item label="讲师资历">
      <el-input v-model="teacher.career"/>
    </el-form-item>

    <el-form-item label="讲师简介">
      <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
    </el-form-item>

    <!-- 讲师头像：TODO -->
    <!-- 讲师头像 -->
    <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload"
            @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduoss/fileoss/uploadOssFile'"  
          field="file"
          @close="close"
        @crop-upload-success="cropSuccess"/>
    </el-form-item>

    <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
    </el-form-item>

  </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

  export default {
      components: { ImageCropper, PanThumb },//声明才可以使用
      data() {

        return {
          teacher: {
            name: '',
            sort: 0,
            level: 1,
            career: '',
            intro: '',
            avatar: ''
          },
        //上传弹框组件是否显示
        imagecropperShow:false,  // 是否显示上传组件
        imagecropperKey:0,
        BASE_API:process.env.BASE_API,
        saveBtnDisabled: false // 保存按钮是否禁用,
      }
    },
    created(){
      this.init()
      
    },
    //监听  路由变化就会执行
    watch: {
      $route(to, from) {
        console.log('watch $route')
        this.init()
      }
    },
    methods: {
      close(){//关闭上传弹窗
        this.imagecropperShow = false
        // 上传失败后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
        this.imagecropperKey = this.imagecropperKey + 1
      },
      cropSuccess(data){ //上传成功
         console.log(data)
         this.imagecropperShow = false
         this.teacher.avatar=data.url
         // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
         this.imagecropperKey = this.imagecropperKey + 1
      },
      init(){

        if (this.$route.params && this.$route.params.id) {

          const id = this.$route.params.id
        //
          this.getInfo(id)
        }else{
          //清空表单
          this.teacher={} 
        }
      },
      saveOrUpdate() {
        this.saveBtnDisabled = true
        if (!this.teacher.id) {
          this.saveTeacher()
        } else {
          this.updateTeacher()
        }
      },

      //修改讲师方法
      // 根据id更新记录
      updateTeacher(){
        teacherApi.updateTeacherinfo(this.teacher)
        .then(respose=>{
           //提示信息
            this.$message({
              type: 'success',
              message: '修改成功!'
              });
              //路由切换
              this.$router.push({ path: '/teacher/table' })
        })
      },

      //根据讲师id查询
      getInfo(id){
        teacherApi.getTeacherInfo(id)
        .then(response =>{
          this.teacher=response.data.teacher
        })
      },
      // 添加讲师的方法
      saveTeacher() {

        teacherApi.addTeacher(this.teacher)
        .then(response => {  //添加成功
            //提示信息
            return this.$message({
              type: 'success',
              message: '保存成功!'
              })
              //路由切换
        }).then(resposne => {
              this.$router.push({ path: '/teacher/table' })
        }).catch((response) => {
            // console.log(response)
            this.$message({
            type: 'error',
            message: '保存失败'
          })
        })
      }

    }
  }
</script>